Sulfur dioxide removal by absorption and fractionation

Patent · Tue Aug 29 04:00:00 EDT 1978

OSTI ID:6529396

Nolley, Jr, J P

Anhydrous liquid sulfur dioxide is recovered from environmentally unsuitable vapor or liquid streams comprising water, sulfur dioxide and carbon dioxide. The vapor streams are fed into an absorption zone and contacted with a lean liquid water stream. A resulting sulfur dioxide rich water stream is passed into a first fractionation column utilized in part as the stripper column which produces the lean water stream. A sidecut stream removed above the feed point is passed into a second fractionation column, and the overhead vapor of the first column is subjected to two stages of partial condensation to aid carbon dioxide rejection. Anhydrous sulfur dioxide is removed as a liquid sidecut of the second column, and the net overhead vapor of the second column is preferably passed into the overhead system of the first column after a partial condensation.

• Assignee: UOP Inc.
• Patent Number(s): US 4110087
• OSTI ID: 6529396
• Country of Publication: United States
• Language: English

Related Subjects

20 FOSSIL-FUELED POWER PLANTS
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42 ENGINEERING
424000 -- Engineering-- Pollution Control Equipment-- (1980-1989)
CHALCOGENIDES
CHEMICAL REACTIONS
CHEMISORPTION
DESIGN
DESULFURIZATION
EQUIPMENT
FLUE GAS
FOSSIL-FUEL POWER PLANTS
FRACTIONATION
GASEOUS WASTES
HYDROGEN COMPOUNDS
INDUSTRIAL PLANTS
LIQUID WASTES
OPERATION
OXIDES
OXYGEN COMPOUNDS
POLLUTION CONTROL
POLLUTION CONTROL EQUIPMENT
POWER PLANTS
REMOVAL
SEPARATION PROCESSES
SORPTION
SULFUR COMPOUNDS
SULFUR DIOXIDE
SULFUR OXIDES
THERMAL POWER PLANTS
WASTE WATER
WASTES
WATER